function showIndex(req,res){
	res.writeHead(200,{'content-type':'text/html;charset=utf-8'});
	res.end('我是首页');
}

function showStu(req,res){
	res.writeHead(200,{'content-type':'text/html;charset=utf-8'});
	res.end('学员首页');
}

function show404(req,res){
	res.writeHead(404,{'content-type':'text/html;charset=utf-8'});
	res.end('404 找不到界面');
}

exports.showIndex=showIndex;
exports.showStu=showStu;
exports.show404=show404;